Edit retrieved ExifTool Tag for new picture file name

Hi All,
I am trying to have my pictures renamed using the ExifTool tag "DateTimeOriginal" which comes up in the form of "AAAA_MM_DD HH_MM_SS".

What I would like to do is simply to remove the underscore "_" character so the new name becomes "AAAAMMDD HHMMSS".

I thank you in advance if anyone has a clue how to do this!
Cheers
This should be obvious if you try to think about it!

Just add a Remove pattern method with Pattern = underscore